Australia produces around 95% of the world's opal, and "opal" isn't one thing — it's a whole family of stones, each with its own character, origin and price. Here's a clear guide to the main types, so you can choose the one that's right for you.
Black opal
The rarest and most valuable. Black opal has a dark body tone that makes its play-of-colour blaze with an intensity no other gem can match. Almost all of it comes from Lightning Ridge in New South Wales. If you want the most vivid colour and a true collector's stone, this is it. Explore black opal →
Boulder opal
Formed in the cracks of ironstone in outback Queensland, boulder opal keeps its natural brown host rock on the back — which makes it strong and gives every stone a completely one-of-a-kind shape and pattern. The second most valuable type, and a favourite for unique, characterful pieces. Explore boulder opal →
Crystal opal
Crystal opal is transparent to translucent, so light passes into the stone and its colour seems to float in three dimensions. Prized for clarity and depth — a luminous, glowing look. Explore crystal opal →
White (milky) opal
The classic opal most people picture: a light body tone with soft, pastel play-of-colour. Most comes from Coober Pedy in South Australia — practically on our doorstep — making it a fitting signature for an Adelaide jeweller, and the most accessible way to own genuine Australian opal. Explore white opal →
Doublets and triplets
These are genuine opal made more affordable. A doublet is a slice of real opal on a dark backing; a triplet adds a clear protective dome on top, making it especially hard-wearing for everyday rings. Both give you vivid opal colour at a fraction of solid-stone prices. Doublets → · Triplets →
How to choose
- Want the most vivid colour / an investment piece? Black or boulder opal.
- Love depth and a glowing, see-into-it look? Crystal opal.
- Want a classic, beautiful opal at an accessible price? White opal.
- Want bright colour on a budget, or a hard-wearing everyday ring? A doublet or triplet.
Still not sure? That's what we're here for. Visit us at 14 King William Street, Adelaide, call (08) 8211 9995, or browse the full range of Australian opal jewellery. We can also design a custom piece around any stone you love.